<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>issac-note</title>
</head>
<style>
    html,body{
        height: 100%;
    }
</style>
<body>
    <div style="text-align: center;margin-top: 150px;font-size: 25px;">welcome to issac-note!</div>
</body>
</html>